, new york. >> talk about the miracle of modern medicine. i can't think of no better example than that. it goes beyond blood cancers and used for prostate cancer and breast cancer, as well. >> and they're pledging $20 million for further research at the university -- penn university to bring the treatment to the market. but unbelievable. if you think of something as negative as hiv and they're using hiv to -- it's unbelievable that they would use that to -- >> you look at that little girl, $20 million, well spent. amazing. >>> still ahead, fans of the late singer jenni rivera are in mourning as her family shares their emotions for the first time with the media. >>> up next, we'll go to miami beach where rivera's death hit especially hard. you're watching "world news now." >>> latin >>> latin superstar jenni rivera had millions of fans, and they're all now mourning the loss after she died in a plane crash on sunday. but her family, they are suffering the most. >> later today, they'll set out to mexico where her plane went down, but they are holding on to the slimmest of hopes that they'